[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
Let's simplify ~
[tex]\qquad \sf \dashrightarrow \:( - 2 - 5i) - ( - 4 + 6i)[/tex]
[tex]\qquad \sf \dashrightarrow \: - 2 - 5i + 4 - 6i)[/tex]
[tex]\qquad \sf \dashrightarrow \: - 2 + 4 - 5i- 6i)[/tex]
[tex]\qquad \sf \dashrightarrow \:2 - 11i[/tex]
Therefore, A is the Correct choice !